Question
A drug interaction is an alteration in the therapeutic action of a drug by [...] of other drugs or exogenous substances.

Question
A drug interaction is an alteration in the therapeutic action of a drug by [...] of other drugs or exogenous substances.
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Question
A drug interaction is an alteration in the therapeutic action of a drug by [...] of other drugs or exogenous substances.
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A drug interaction is an alteration in the therapeutic action of a drug by concurrent administration of other drugs or exogenous substances.

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